ZF 0730.501.815 RETAINING RING for WG94 | OEM Genuine Part

Overview

The ZF 0730.501.815 RETAINING RING is a critical axial locking component engineered specifically for the WG 94 series of heavy-duty powershift transmissions. This OEM genuine part, identified by SKU 0730.501.815, secures internal gear assemblies and bearing packs against the transmission housing bore, preventing lateral displacement under high torque loads. It sits directly within the clutch drum or planetary carrier assembly, where it interfaces with the TRANSMISSION HOUSING to maintain precise gear alignment. Without this ring, the entire rotating assembly loses its positional integrity, leading to catastrophic internal contact.

Symptoms of Failure

When the 0730.501.815 retaining ring fatigues or breaks, operators will notice distinct performance degradation. Common failure symptoms include:

• Intermittent gear slipping under load: A worn ring allows the planetary gearset to shift axially, causing momentary loss of drive torque.
• Metallic grinding noises from the bell housing: This indicates the ring has dislodged, allowing gears to contact the HOUSING II surface.
• Unexplained transmission fluid contamination: Metal shavings from a fractured ring circulate through the hydraulic system, clogging valves and filters.
• Hard shifting or delayed engagement: Axial play from a missing ring disrupts clutch pack clearance, altering shift timing.

Technical Specifications

Compatibility

This retaining ring is a direct fit for the ZF WG 94 transmission series. Based on its design and dimensions, it is also compatible with the following ZF models that share the same planetary carrier architecture: WG180, WG200, WG120, and WG150. Always verify the snap ring groove diameter in your specific housing before installation. The ring works in conjunction with the CYLINDRICAL PIN to index the assembly correctly, and the TYPE PLATE should be consulted for exact model variant identification.

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